Outlook 2003 crashing in module vbe6.dll

I get the following error-item in the event viewer whenever I exit outlook:

Event Type: Error
Event Source: Microsoft Office 11
Event Category: None
Event ID: 1000
Date: 14.02.2004
Time: 14:57:56
User: N/A
Computer: KONRAD
Description:
Faulting application outlook.exe, version 11.0.5510.0, stamp 3f1380f0,
faulting module vbe6.dll, version 6.4.99.69, stamp 3f00a6d9, debug? 0, fault
address 0x000d6fe4.

When I start outlook and open the VB editor, there is still some macro
running, so I can't edit any source code.If I click on break or stop outlook
crashes immediately. In the Application_Startup() method I only set some
variables of the main module:

Private Sub Application_Startup()
Set Main.NameSpace = GetNamespace("MAPI")
Set Main.FolInbox = Main.NameSpace.GetDefaultFolder(olFolderInbox)
Set Main.FolDelete =
Main.NameSpace.GetDefaultFolder(olFolderDeletedItems)
Set Main.FolOutbox = Main.NameSpace.GetDefaultFolder(olFolderOutbox)
Set Main.FolShareIT = Main.FolInbox.Folders("Share-IT")
End Sub


The error suddenly occurs and I don't know what causes it. Running 'Detect &
Repair' did not help. I have some very important macros which ran before
without problems.
I have Outlook 2003 and all updates, which are available via 'Office
Update'. Can anybody help? How can I check which macro hangs, when I cannot
even click on Break?

Regards
Konrad